Key points from article :
Wealth enables them to live a healthier life.
77 percent agreed that working as long as possible is good for your health.
Research on that front is mixed.
American 95-year olds in 2014 had a life expectancy of 98.
Less than 20% of UK current 50 year-olds will make it to 100.
The study was published in the JAMA.
